superfetation

简明释义

英[ˌsuːpəfiːˈteɪʃ(ə)n;ˌsjuː-]美[ˌsjʊpəfiˈteʃən]

n. [胚] 异期复孕；重孕

英英释义

单词用法

同义词

反义词

例句

1.Mrs Grovenburg's pregnancy was eventually identified as "superfetation".

格鲁温伯格女士最终被确定为是“重孕”。

2.Mrs Grovenburg's pregnancy was eventually identified as "superfetation", meaning two babies are conceived at different times, born on the same day yet - medically speaking - are not considered twins.

格鲁温伯格女士最终被确定为是“重孕”，就是说她在不同的时间段怀上了两个孩子，但是孩子在同一天出生了，从医学上说，他们并不是双胞胎。

3.Mrs Grovenburg's pregnancy was eventually identified as "superfetation", meaning two babies are conceived at different times, born on the same day yet - medically speaking - are not considered twins.

格鲁温伯格女士最终被确定为是“重孕”，就是说她在不同的时间段怀上了两个孩子，但是孩子在同一天出生了，从医学上说，他们并不是双胞胎。

4.In some cases of superfetation, the two embryos can be at different stages of development.

在一些超孕的情况下，两个胚胎可能处于不同的发育阶段。

5.Cases of superfetation are extremely rare in humans but have been documented in some animal species.

人类中超孕的案例极其罕见，但在某些动物物种中有记录。

6.The phenomenon of superfetation occurs when a second embryo is conceived during an ongoing pregnancy.

在持续怀孕期间，第二个胚胎受孕的现象称为超孕。

7.The research focused on the genetic implications of superfetation in mammals.

这项研究集中于超孕对哺乳动物的遗传影响。

8.Doctors were surprised to discover superfetation in their patient, as it is not commonly seen.

医生们惊讶地发现他们的病人出现了超孕的情况，因为这并不常见。

作文

Superfetation is a fascinating phenomenon that occurs in some animal species, where a female can conceive a second time while already pregnant. This unusual reproductive strategy allows for the development of embryos at different stages within the same gestational period. In most mammals, including humans, this process is virtually impossible due to hormonal and physiological changes that occur during pregnancy. However, certain species, such as some rodents and marsupials, have exhibited cases of superfetation (重叠妊娠). To understand superfetation (重叠妊娠), it is essential to explore the reproductive mechanisms in these animals. In typical mammalian reproduction, once a female becomes pregnant, her body undergoes a series of changes that prevent further ovulation and fertilization. This is primarily regulated by hormones such as progesterone, which maintains the pregnancy and inhibits the release of additional eggs. However, in species capable of superfetation (重叠妊娠), the hormonal balance can allow for another cycle of ovulation, leading to the possibility of multiple conceptions. The implications of superfetation (重叠妊娠) are intriguing from an evolutionary perspective. For animals that may face unpredictable environmental conditions or varying food availability, having offspring at different developmental stages could provide a survival advantage. For example, if an initial litter is born and environmental conditions worsen, the later-developing embryos might be better suited to survive in the new conditions. This adaptability can enhance the overall reproductive success of the species. In humans, the occurrence of superfetation (重叠妊娠) is exceedingly rare, with only a handful of documented cases throughout history. These instances often involve women who have reported becoming pregnant again shortly after conceiving, resulting in the birth of twins with significantly different gestational ages. The medical community remains intrigued by these rare cases, as they challenge our understanding of human reproductive biology. The study of superfetation (重叠妊娠) not only sheds light on the complexities of reproductive strategies in the animal kingdom but also raises questions about the adaptability of life forms in response to environmental challenges. As scientists continue to investigate this phenomenon, we gain deeper insights into the mechanisms of reproduction, the evolution of species, and the remarkable ways in which life persists. In conclusion, superfetation (重叠妊娠) serves as a captivating example of nature's ingenuity. While it remains a rarity among mammals, its existence highlights the diversity of reproductive strategies that have evolved over time. Understanding this process not only enriches our knowledge of biology but also emphasizes the intricate connections between organisms and their environments. As we explore the mysteries of reproduction, phenomena like superfetation (重叠妊娠) remind us of the wonders of life and the continuous adaptations that occur within the natural world.

重叠妊娠是一个迷人的现象，发生在某些动物物种中，雌性在已经怀孕的情况下可以再次受孕。这种不寻常的繁殖策略使得在同一妊娠期内可以发育出不同阶段的胚胎。在大多数哺乳动物，包括人类中，这一过程几乎是不可能的，因为在怀孕期间，体内会发生激素和生理变化。然而，某些物种，如一些啮齿动物和有袋类动物，已经出现了重叠妊娠的案例。要理解重叠妊娠，必须探讨这些动物的繁殖机制。在典型的哺乳动物繁殖中，一旦雌性怀孕，身体就会经历一系列变化，以防止进一步的排卵和受精。这主要是由黄体酮等激素调节的，这种激素维持妊娠并抑制释放额外的卵子。然而，在能够进行重叠妊娠的物种中，激素平衡可能允许另一个排卵周期，从而导致多次受孕的可能性。从进化的角度来看，重叠妊娠的影响是引人入胜的。对于那些可能面临不可预测环境条件或食物供应变化的动物来说，在不同发育阶段拥有后代可能提供生存优势。例如，如果初始的幼崽出生，而环境条件恶化，后期发育的胚胎可能更适合在新条件下生存。这种适应性可以增强物种的整体繁殖成功率。在人类中，重叠妊娠的发生极为罕见，历史上只有少数几例被记录。这些实例通常涉及报告在怀孕后不久再次怀孕的女性，导致出生的双胞胎具有显著不同的妊娠年龄。医学界对这些罕见案例保持着浓厚的兴趣，因为它们挑战了我们对人类生殖生物学的理解。重叠妊娠的研究不仅揭示了动物王国中繁殖策略的复杂性，也引发了关于生命形式如何应对环境挑战的适应性问题。随着科学家们继续研究这一现象，我们对生殖机制、物种的进化以及生命持续存在的非凡方式有了更深刻的理解。总之，重叠妊娠作为自然智慧的迷人例子。尽管在哺乳动物中它仍然是一个稀有现象，但它的存在突显了随着时间推移而演变出的繁殖策略的多样性。理解这一过程不仅丰富了我们对生物学的知识，也强调了生物体与其环境之间的复杂联系。当我们探索生殖的奥秘时，像重叠妊娠这样的现象提醒我们生命的奇迹和自然界中不断发生的适应。